Homework Answers
a. Calculate the volume of 0.450 M Ba(OH), which will be needed to neutralize 46,00 mL of 0.252 M HCI.
a. Calculate the volume of 0.450 M Ba(OH), which will be needed to neutralize 46,00 mL of 0.252 M HCI. b. Find the molar concentration of a sulfuric acid solution, 35.00 mL of which neutralizes 25.00 mL of 0.320 M NaOH. (Careful! Sulfuric acid is diprotic!) c. Calculate the "molarity of water" H₂O in pure water at 30°C. (Hint: The density of water at 30°C is 0.9957 g/mL.] d. A 15.00 mL sample of a solution of H₂SO₄ of unknown concentration was titrated with...
QUESTION 40 Boric acid, Hybos, is commonly used in eyewash solutions in chemistry laboratories to nevare...
QUESTION 40 Boric acid, Hybos, is commonly used in eyewash solutions in chemistry laboratories to nevare bases splashed in the eyes HBO (g) + 3NaOH(-+ 3H20) Nayo () A 0.433 M sodium Hydroxide solution is used to neutrale a 32.55 ml sample of boric acid. During an experiment, 21.05 m. of sodium hydroxide is required for complete neutralization of the boric acid to a phenolphthalein endpoint Calculate the number of males of borle acid neutralized by the sodium Hydroxide. Give...
Analysis of Vinegar EXPERIMENT NAME SECTION DATE POSTLABORATORY ASSIGNMENT 1. A standard nitric acid solution is...
Analysis of Vinegar EXPERIMENT NAME SECTION DATE POSTLABORATORY ASSIGNMENT 1. A standard nitric acid solution is prepared using 0.425 g of sodium carbonate, NaCO3. Find the molarity of the acid if 33.25 mL are required to reach a permanent endpoint. 2 HNO, (aq) + Na2CO3(s) + 2 NaNO3(aq) + H2O(l) + CO2(g) 2 H OT 2. A 10.0-ml sample of household ammonia solution required 27.50 mL of 0.241 M HNO3 for neutralization. Calculate (a) the molar concentration of the ammonia...
2. Calculate the mass of solid sodium hydroxide needed to prepare 300 mL of 0.1 M...
2. Calculate the mass of solid sodium hydroxide needed to prepare 300 mL of 0.1 M sodium hydroxide. Note: Be sure to include this mass in the procedure for Part C. 3. A 0.6250 g sample of KHP (204.2 g/mol), dissolved in 50 mL water, required 28.50 mL of sodium hydroxide to reach the end point. What is the concentration of the sodium hydroxide solution? 4. A 25.00 mL sample of hydrochloric acid was titrated using the same sodium hydroxide...
3. For the n=5 to n=2 transition: E = in nm = in Å = Color...
3. For the n=5 to n=2 transition: E = in nm = in Å = Color of corresponding line in the hydrogen spectrum: We were unable to transcribe this image
Unknown acid 2 6. Complete the following table. Trial 1 Trial 2 Trial 3 Mass of...
Unknown acid 2 6. Complete the following table. Trial 1 Trial 2 Trial 3 Mass of unknown (8) 0.175 0.120 0.122 Initial buret reading (mL) 0.00 22.37 0.00 Final buret reading (mL) 22.37 44.85 22.83 Volume of NaOH added (mL) 22.37 22.48 22.83 We will assume that the data collected for the first trial is not accurate. 7. What is the average mass of unknown acid for Trials 2 and 3? (Must show calculations) 8. What is the average volume...
page 74 Exp. 9: Acid-Base Titration Questions (show your work for the math problems!) Write a...
page 74 Exp. 9: Acid-Base Titration Questions (show your work for the math problems!) Write a balanced equation as in footnote 2 for the neutralization of formic acid with sodium hydroxide. 1. H-C-OH Formic acid If an air bubble is t initially in the tip of the vinegar buret, but disappears' during the 2. course of the titration, how would this affeet your calculation for the concentration of (larger, smaller, no effect)? Explain your answer. Explain how the indicator phenolphthalein...
2. How many mL of 0.100M NaOH would you need to titrate if you measured out...
2. How many mL of 0.100M NaOH would you need to titrate if you measured out 0.120 g of oxalic acid? Must show calculation. (5 pts) lying an unknown acid Objective: Identify an unknown diprotic acid by determining its molecular weight. Introduction: A diprotic acid is an acid that yields two H ions per acid molecule. Therefore, two moles of NaOH are need to react with every one mole of diprotic acid. The net reaction of a diprotic acid, H:X,...
Titration: Acids and Bases 2. How can you determine which acid is diprotic? 3. using the...
Titration: Acids and Bases
2. How can you determine which acid is diprotic?
3. using the answers to questions one and two, which acid is
diprotic?
4. Which base has more hydroxide ions per molecule?
Acid Volume Base Base Initial Volume (mL) Base Final Volume (mL) Volume of Base Used (mL) Acid: Base Ratio Acid 1 20 mL Base 1 50 mL 34.5 15.5 4:3 Acid 2 20 mL Base 1 Acid 1 20 mL Base 2 Acid 2 20...
pre lab #2 & #3 vvith the end point of the titration, you can calculate the...
pre lab #2 & #3
vvith the end point of the titration, you can calculate the number on" of sodium hydroxide delivered from the stoichiometry. LEARNING OUTCOMES 1. Understand the concepts of an acid-base reaction and titration 2. Know what the end point is and how it applies to stoichiometry 3. Determine the acetic acid content in vinegar 4. Demonstrate correct titration technique 5. Use group data to draw a conclusion of the "best buy" brand of vinegar PRE-LABORATORY ASSIGNMENT...
QUESTION 40 Boric acid, Hybos, is commonly used in eyewash solutions in chemistry laboratories to nevare bases splashed in the eyes HBO (g) + 3NaOH(-+ 3H20) Nayo () A 0.433 M sodium Hydroxide solution is used to neutrale a 32.55 ml sample of boric acid. During an experiment, 21.05 m. of sodium hydroxide is required for complete neutralization of the boric acid to a phenolphthalein endpoint Calculate the number of males of borle acid neutralized by the sodium Hydroxide. Give...
Analysis of Vinegar EXPERIMENT NAME SECTION DATE POSTLABORATORY ASSIGNMENT 1. A standard nitric acid solution is prepared using 0.425 g of sodium carbonate, NaCO3. Find the molarity of the acid if 33.25 mL are required to reach a permanent endpoint. 2 HNO, (aq) + Na2CO3(s) + 2 NaNO3(aq) + H2O(l) + CO2(g) 2 H OT 2. A 10.0-ml sample of household ammonia solution required 27.50 mL of 0.241 M HNO3 for neutralization. Calculate (a) the molar concentration of the ammonia...
2. Calculate the mass of solid sodium hydroxide needed to prepare 300 mL of 0.1 M sodium hydroxide. Note: Be sure to include this mass in the procedure for Part C. 3. A 0.6250 g sample of KHP (204.2 g/mol), dissolved in 50 mL water, required 28.50 mL of sodium hydroxide to reach the end point. What is the concentration of the sodium hydroxide solution? 4. A 25.00 mL sample of hydrochloric acid was titrated using the same sodium hydroxide...
3. For the n=5 to n=2 transition: E = in nm = in Å = Color of corresponding line in the hydrogen spectrum: We were unable to transcribe this image
Unknown acid 2 6. Complete the following table. Trial 1 Trial 2 Trial 3 Mass of unknown (8) 0.175 0.120 0.122 Initial buret reading (mL) 0.00 22.37 0.00 Final buret reading (mL) 22.37 44.85 22.83 Volume of NaOH added (mL) 22.37 22.48 22.83 We will assume that the data collected for the first trial is not accurate. 7. What is the average mass of unknown acid for Trials 2 and 3? (Must show calculations) 8. What is the average volume...
page 74 Exp. 9: Acid-Base Titration Questions (show your work for the math problems!) Write a balanced equation as in footnote 2 for the neutralization of formic acid with sodium hydroxide. 1. H-C-OH Formic acid If an air bubble is t initially in the tip of the vinegar buret, but disappears' during the 2. course of the titration, how would this affeet your calculation for the concentration of (larger, smaller, no effect)? Explain your answer. Explain how the indicator phenolphthalein...
2. How many mL of 0.100M NaOH would you need to titrate if you measured out 0.120 g of oxalic acid? Must show calculation. (5 pts) lying an unknown acid Objective: Identify an unknown diprotic acid by determining its molecular weight. Introduction: A diprotic acid is an acid that yields two H ions per acid molecule. Therefore, two moles of NaOH are need to react with every one mole of diprotic acid. The net reaction of a diprotic acid, H:X,...
Titration: Acids and Bases
2. How can you determine which acid is diprotic?
3. using the answers to questions one and two, which acid is
diprotic?
4. Which base has more hydroxide ions per molecule?
Acid Volume Base Base Initial Volume (mL) Base Final Volume (mL) Volume of Base Used (mL) Acid: Base Ratio Acid 1 20 mL Base 1 50 mL 34.5 15.5 4:3 Acid 2 20 mL Base 1 Acid 1 20 mL Base 2 Acid 2 20...
pre lab #2 & #3
vvith the end point of the titration, you can calculate the number on" of sodium hydroxide delivered from the stoichiometry. LEARNING OUTCOMES 1. Understand the concepts of an acid-base reaction and titration 2. Know what the end point is and how it applies to stoichiometry 3. Determine the acetic acid content in vinegar 4. Demonstrate correct titration technique 5. Use group data to draw a conclusion of the "best buy" brand of vinegar PRE-LABORATORY ASSIGNMENT...
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